@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

#siteshot-Capture-Button {
  list-style-image: url("chrome://siteshot/skin/siteshot32.png");
}

toolbar[iconsize="small"] #siteshot-Capture-Button {
  list-style-image: url("chrome://siteshot/skin/siteshot20.png");
}